Home Speaker Asylum

General speaker questions for audio and home theater.

RE: How to reduce sensitivity of tweetor?

Simply placing a resistor in series with the tweeter will change the impedance of the load the crossover sees, thus changing the crossover frequency and screwing up any equalization of the tweeter included in the crossover.

The solution is called an "L-pad", and doesn't change the impedance seen by your crossover. It uses two resistors - one in series with the driver, and one in parallel. It is placed in the circuit between the crossover and the driver.

As an alternative, you can purchase a continuously-variable L-pad from either Madisound or Parts Express. These come in 8 and 4 ohm versions.

Duke

p.s. - The crossover frequency will shift upwards with an L-pad because you're shelving the tweeter's response downward (in amplitude) so the overlap point shifts upward (in frequency). In practice this shouldn't be a problem.




Edits: 01/24/08 01/24/08

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